Duplex strainer



.'1 1927,.l Apr! 19, F. HALL?,

DUPLEX S'Tnynn 2 2 Vsheets-sim@ 1 -lNvzNIoR M uw@ am ATro'RNEY -April19, 1927.

l 1,625,024. F. HALL DUPLEX STRAINER v Filed Dec. ze, 1925 2sheets-sheet 2 i xNvENToR ATroRNY Patented Apr. 19, 1227.

1,625,024 Inutren A:s'rara's Partnr orifice.

FREDERICK HALL, OF PLAIN-FIELD, NEW JERSEY, ASSIGNORl TO BERGGREN ENGI-NEERING CORPORATION, OF BROOKLYN; NEW YORK, A CORPORATION OF NEW DUPLEX'STRAINER.

' Application filed ,December'26, 1925. Serial IIa-77,692.

My invention relates to fluid strainers of thelduplex type and isadapted for the treatment of oil, water, steam or other fluid carryingt'oreign matter in suspension, and will be understood by reference tothe following Specification taken in connection with the accompanyingdrawings in which Fig. l is a part plan and part horizontal section,`the section being on the plane of the line 1 1 of Fig. 2; Fig. 2 is acentral vertical section on the planeof the line 2 2 of Fig.4 1; Fig. 3is a horizontal section on the plane of the line -3-3 of Fig. 4; Fig. 4is transverse section on the plane ot the line 4-4 ot Fig. 1, and Fig. 5is aperspective View of a detail. Similar reference numerals indicatesimilar parts in the several views.

Referring to the drawings the numeral 1 designates the body or casing ofthe strainer `the interior of which is divided by ribs 2, 3 and 4 into aplurality of chambers through which the fluid to be treated is caused toflow through oneI strainer or the other aecording to the position of thevalves to be hereinafter described. The form and rela.- tion of thesechambers are illustrated in Figures 2 and 4 and for convenience ofdescription I have designated them by the numerals 5 to 10 b othinclusive. On one side of the casing is an inlet connection 11 throughwhich the fluid flows into a valve chamber 6, this chamber serving as.the inlet for both 'strainers On the opposite side of the casing is anoutlet connection 12 which receives the discharge from both strainersthrough the valve chamber 9. The strainers 13' and 14, which are of 'thedouble basket type, are suitably supportedin the chambers vor wells 8and 1() respectively, both of which chambers extend below the common'inlet and outlet connections 11 and 12 respectively. The wells areclosed by covers 15 similar in construction, and these are held to theirseats on the casing by yokes `16 pivoted at one end upon a bolt or pin17 and held securely inplace by nuts 18. In the common inlet chamber isa valve 19 and in the common outlet chamber 9 is a valve 20. Therespective valve Vstems 121 and 21 pass, through suitable-'stuflingboxes and glands in the cover 22. The chamber 6 is provided withtwoaligned valve seats 2,3 and 24 the openings through which communicaterespectively: with the chambers 7 and 5, and

the chamber 9 is provided with aligned valve.

seats 25 and 26 the openings through which communicate with the chambers10 and 9 resl'z-ectively. 'lhc position of the valves determines thedirection of flow of the fluid through one or the other 'of thestrainers 13 and 14.

' To effect the simultaneous movement of the valves 19 and 2() andto,insure their proper seating` their stems 2l and 217 are threaded attheir upper ends to receive spools 27 which are held thereon by checknuts 28. Threaded into a boss projecting from the upper side. of cover22 is a valve operating stem 29 provided with a handle 30 by which itmay be rotated. The stem 29 is formed with a collar 31 and is surroundediinmediately below the handle with a tbimble 32.' Supported upon thecollar and between it and thimble 32, the steril 29 carries a floatingyoke 33 formed with bil'urcated ends, as shown in Fig. 5, which embracethe spools 27. The opening 34 in yoke 33 is so formed that its wal atits center .bears against stem 29, and from the center is curvedoutwardly in both directions. This ,gives sufficient clearance betweenstem 29 and the yoke and provides a compensating 'means to insure properseating of the valves 1n both their upper and lower positions.

lVith the valves in their lower positions, asV shown in the drawings,the fluid to bc filtered will pass through the basket 14, while theother basket will be 'by-passed to permit it to .be cleaned. In suchposition of the valves, the fluidenters inlet 11, flows into chamber 6,through the upper valveseat 23 into chamber 7, through the perforationsof basket V14 in'to chamber 10, through upper sat'25 of valve 20. intochamber 9 and then through outlet 12. W hen the direction of flow is tobeAthrough basket 13 and )basket 14 is to be byt-passed to permit it tobev cleaned, both valves are. raised simultaneously by turning theircommon operating stem 29 by means of its handle 30, and seated upontheir respective upper seats 23 and-25. The flow of the fluid will nowbe lfrom inlet 1'1 to chamber 6, through the lower valve seat' tochamber 5, through the perforations of basket -13 through lower valveseat 26 to chamber 9 and thence. to outlet 12. When basket 13 againrequires cleaning the valves 19 and into chamber- 8,

will be moved to their lower seats 'when the course of the fluid will beas first above stated,

From the foregoing description it will be seen that the )revision of asinfrlecasino- D 25 .compensates for the wear on the valves and theirseats and insures proper seating of the valves in both positions.

A further advantage may be noted in that 4the inlet and outlet are inthe same plane.

This permits ota s vlnmetreal arrai'igement of the piping and does auaywith offsets. Also, the outlet bein;r considerably higher than thebottoms of the Wells allowsthe sludge to settle in the wells and tovbedischarged through the cleaning out plugs 35.

l/Vith reference to the operation, it is to v'he noted that there is11o-stoppage of the flow at any time while the change is .being madefromone strainer to the other. Vhen the valves are off their seats the flowis through both )veils but is cut off from one of the wells the momentthe valves are seated on either their lower or upper seats. This 1s of`particular advantage in. oil burning sys tenis in which provisionmustbe made 4to' insure a constant flow of the oil,

What 4l elaim is:

l. A fluid strainer of the duplex type eoin prising a easing havingrribs dividing its 1nterior into a plurality otehambers in two ot' whichstrainers are mounted, another of said chambers serving; as an'inlet tothe strainers and another' as an outlet from the strainers. said inletand outlet chambers haviner aligned upper and lower valve seats, valvesin the inlet and outlet chambers7 and a common operating means connectedto the valvestems for simultaneously seating the valves on eithertheirupper or lower seats to thereby direct the flow of' the fluidthrough one strainer and to hy-pass the other.

2. Apparatus pensating' device to insure proper seating of the valves. i

3. Apparatus of-claim 1 having a Heating yoke surrounding the individualvalve stems, t'or the purpose described.

In testimony,

December, 1925.

FREDERICK HALL.

of elaim 1 having a coinwhereof, I have signed myn name to thisspeeieation this 24th day of

